Food stains can be categorized into several types based on their origin. Common categories include greasy stains from oils and fats, pigment stains from fruits and vegetables, and protein stains from dairy and meat products. Each type requires different cleaning methods for effective removal. Additionally, stains can be classified by their source, such as beverage stains from coffee, tea, or wine, and sauce stains from items like ketchup or mustard. Understanding these categories helps in selecting the right cleaning agents and techniques to tackle specific stains effectively.